We did talk about using drupal_lookup_path() to get path alias.

• Drupal – Get Path Alias from Node ID/nid

The above function is still working in Drupal 7. We could also use the url() to get the path alias url as well.

// Get the node id path alias
url('node/' . $tid);

// Get the term id path alias
url('taxonomy/term/' . $tid);

Done =)

Reference:

• Drupal API – url
• Drupal API – drupal_lookup_path